How to attach and mount an EFS to my EC2 instance using AWS CDK-CodePudding

I'd like to automatically mount an EFS to my EC2 instance using AWS CDK.

I created the file system:

        self.file_system = efs.FileSystem(
            scope=self,
            id="Efs",
            vpc=self.vpc,
            file_system_name="EFS",
            removal_policy=RemovalPolicy.DESTROY,
        )

and the Ec2 instance:

        self.ec2_instance = ec2.Instance(
            scope=self,
            id="ec2Instance",
            instance_name="my_ec2_instance",
            instance_type=ec2.InstanceType.of(
                instance_class=ec2.InstanceClass.BURSTABLE2,
                instance_size=ec2.InstanceSize.MICRO,
            ),
            machine_image=ec2.AmazonLinuxImage(
                generation=ec2.AmazonLinuxGeneration.AMAZON_LINUX_2
            ),
            vpc=self.vpc,
            vpc_subnets=ec2.SubnetSelection(subnet_type=ec2.SubnetType.PUBLIC),
            key_name="ec2-key-pair",
            security_group=ec2_security_group,
        )

Now what do I need to do to get them attached? I see many examples of doing this on the console, but so far I haven't found a way to do it in AWS CDK.

CodePudding user response：

You can just call connect on your created EFS after you created both EFS and EC2:

file_system.connections.allow_default_port_from(instance)

In your case:

self.file_system.connections.allow_default_port_from(self.ec2_instance)

Here is the documentation: https://docs.aws.amazon.com/cdk/api/v1/python/aws_cdk.aws_efs/README.html#connecting

If you need to mount it during launch, you can execute code via the user data of ec2:

file_system.connections.allow_default_port_from(instance)

instance.user_data.add_commands("yum check-update -y", "yum upgrade -y", "yum install -y amazon-efs-utils", "yum install -y nfs-utils", "file_system_id_1="   file_system.file_system_id, "efs_mount_point_1=/mnt/efs/fs1", "mkdir -p "${efs_mount_point_1}"", "test -f "/sbin/mount.efs" && echo "${file_system_id_1}:/ ${efs_mount_point_1} efs defaults,_netdev" >> /etc/fstab || "   "echo "${file_system_id_1}.efs."   Stack.of(self).region   ".amazonaws.com:/ ${efs_mount_point_1} nfs4 nfsvers=4.1,rsize=1048576,wsize=1048576,hard,timeo=600,retrans=2,noresvport,_netdev 0 0" >> /etc/fstab", "mount -a -t efs,nfs4 defaults")

Documentaion pieces here: https://docs.aws.amazon.com/cdk/api/v1/python/aws_cdk.aws_efs/README.html#mounting-the-file-system-using-user-data